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HP 28S
10-12-2014, 04:49 PM
Post: #1
HP 28S
Dear all,

I used a HP 28S during the 80's at school....
In 1992, I lost my calculator in Spain (during olympic games).
After that I bought a Casio and used it years and years.
But Last week, I decided to buy a second hand 28S... to go back in the past!
I received it last friday!
It works perfectly but the battery cover is broken....
Do you have a solution ? Probably 3D printing?

Please help

Best regards from Luxemburg to all of you

Marc
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10-12-2014, 07:17 PM
Post: #2
RE: HP 28S
Hi Marc, read this previous post please

regards


(10-12-2014 04:49 PM)marc556 Wrote:  Dear all,

I used a HP 28S during the 80's at school....
In 1992, I lost my calculator in Spain (during olympic games).
After that I bought a Casio and used it years and years.
But Last week, I decided to buy a second hand 28S... to go back in the past!
I received it last friday!
It works perfectly but the battery cover is broken....
Do you have a solution ? Probably 3D printing?

Please help

Best regards from Luxemburg to all of you

Marc
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10-13-2014, 10:25 AM
Post: #3
RE: HP 28S
(10-12-2014 07:17 PM)aurelio Wrote:  Hi Marc, read this previous post please

regards

Marc: I bought a couple of the wrap-around metal strips and they work well. Before I got them I simply snipped a thin piece of steel to size and slid that into place - that worked too. The advantage of the strips is that they work even if the sides of the opening into the battery compartment are damaged.

Nigel (UK)
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10-14-2014, 09:18 PM
Post: #4
RE: HP 28S
The solution is a 48SX. Smile
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10-15-2014, 09:04 PM
Post: #5
RE: HP 28S
(10-14-2014 09:18 PM)Dave Britten Wrote:  The solution is a 48SX. Smile
If you want a display contrast similar as good as on the 28S, I'd recommend an 48GX (latest incarnation with high contrast LCD) instead;-)

-- Ray
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10-15-2014, 10:40 PM
Post: #6
RE: HP 28S
(10-15-2014 09:04 PM)Raymond Del Tondo Wrote:  
(10-14-2014 09:18 PM)Dave Britten Wrote:  The solution is a 48SX. Smile
If you want a display contrast similar as good as on the 28S, I'd recommend an 48GX (latest incarnation with high contrast LCD) instead;-)

Surprisingly, the 48S(X) actually has better contrast than the GX in situations where it's viewed from a low angle, e.g. on your desk within arms' reach. The GX screen gives you a weird shadow/ghosting effect from those angles. That's the main reason I keep a 48SX on my desk at work.
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10-16-2014, 03:35 AM
Post: #7
RE: HP 28S
(10-15-2014 10:40 PM)Dave Britten Wrote:  Surprisingly, the 48S(X) actually has better contrast than the GX in situations where it's viewed from a low angle, e.g. on your desk within arms' reach. The GX screen gives you a weird shadow/ghosting effect from those angles. That's the main reason I keep a 48SX on my desk at work.

I'm apparently in the minority, but I like the keyboard layout of the 48S/SX better than that of the 48G/GX. I especially didn't like the loss of "VISIT" from the keyboard. I also didn't like losing the intuitive grouping of last stack/arg/cmd/menu.
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10-16-2014, 04:16 AM
Post: #8
RE: HP 28S
(10-16-2014 03:35 AM)brouhaha Wrote:  I'm apparently in the minority, but I like the keyboard layout of the 48S/SX better than that of the 48G/GX.

I prefer it too.


- Pauli
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10-16-2014, 11:00 AM
Post: #9
RE: HP 28S
(10-16-2014 04:16 AM)Paul Dale Wrote:  
(10-16-2014 03:35 AM)brouhaha Wrote:  I'm apparently in the minority, but I like the keyboard layout of the 48S/SX better than that of the 48G/GX.

I prefer it too.

- Pauli

Me too.
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10-16-2014, 11:15 AM
Post: #10
RE: HP 28S
(10-16-2014 11:00 AM)Steve Simpkin Wrote:  
(10-16-2014 04:16 AM)Paul Dale Wrote:  I prefer it too.

- Pauli

Me too.

And me! I don't want to use the 48 because the display is so horrible. The worst LCD I have ever come across anywhere. And the uncluttered clamshell keyboard is really really good.
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10-16-2014, 02:09 PM
Post: #11
RE: HP 28S
(10-16-2014 03:35 AM)brouhaha Wrote:  I'm apparently in the minority, but I like the keyboard layout of the 48S/SX better than that of the 48G/GX. I especially didn't like the loss of "VISIT" from the keyboard.

Although it's not printed on the keyboard, the G/GX does have VISIT's functionality available on the keyboard, both for variables and stack levels.

To VISIT a variable, put its name on level 1 and press [left-shift] [+/-], which is marked "EDIT". On the G/GX, EDIT on a variable name does what VISIT does on the S/SX. This makes it as easy on the G/GX as on the S/SX.

To VISIT a stack level, put the number of the stack level PLUS ONE on level 1, press [up-arrow] to enter the interactive stack, and press [right-shift] [+/-], or [right-shift] [F2]. This is not as simple as the S/SX's VISIT key, but the functionality is there if you need it.

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10-21-2014, 12:29 AM
Post: #12
RE: HP 28S
(10-16-2014 02:09 PM)Joe Horn Wrote:  On the G/GX, EDIT on a variable name does what VISIT does on the S/SX. This makes it as easy on the G/GX as on the S/SX.

I dislike that because sometimes I actually want to edit a name in level 1, rather than the variable the name references. I don't like EDIT doing one thing for names, and another thing for anything else.
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10-21-2014, 04:51 AM
Post: #13
RE: HP 28S
(10-21-2014 12:29 AM)brouhaha Wrote:  
(10-16-2014 02:09 PM)Joe Horn Wrote:  On the G/GX, EDIT on a variable name does what VISIT does on the S/SX. This makes it as easy on the G/GX as on the S/SX.

I dislike that because sometimes I actually want to edit a name in level 1, rather than the variable the name references.

But that's even easier: just press down-cursor. A single non-shifted keystroke. Can't beat that.

(10-21-2014 12:29 AM)brouhaha Wrote:  I don't like EDIT doing one thing for names, and another thing for anything else.

Tastes differ. I like it, and I like even more how this "smart" functionality in the 48G evolved into the EDIT, EDITB, VISIT, and VISITB functions on the 49/50, in which they are programmable AND on the keyboard AND in various menus. Lots of power for those who use the machine enough to remember what's where.

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10-21-2014, 05:22 AM
Post: #14
RE: HP 28S
(10-21-2014 04:51 AM)Joe Horn Wrote:  But that's even easier: just press down-cursor. A single non-shifted keystroke. Can't beat that.
I find that even more intuitive, down-cursor edits name, EDIT - the content of it.
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10-21-2014, 05:32 AM
Post: #15
RE: HP 28S
(10-21-2014 05:22 AM)RMollov Wrote:  
(10-21-2014 04:51 AM)Joe Horn Wrote:  But that's even easier: just press down-cursor. A single non-shifted keystroke. Can't beat that.
I find that even more intuitive, down-cursor edits name, EDIT - the content of it.

Except that EDIT doesn't always edit the "contents" of it. It only does that if it's a name.

I liked VISIT because it was 100% consistent in its behavior. (Here's an opportunity for someone to quote Emerson at me, but if you're going to do it, do it right.) I don't see any advantage in the inconsistent behavor of 48G series EDIT over the consistent behavior of EDIT and VISIT of the 48S series.

There's just no pleasing some people. :-)
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10-21-2014, 12:02 PM
Post: #16
RE: HP 28S
(10-21-2014 05:32 AM)brouhaha Wrote:  I liked VISIT because it was 100% consistent in its behavior. (Here's an opportunity for someone to quote Emerson at me, but if you're going to do it, do it right.)

Fear not. I especially enjoy the quotation (almost a rhyme), since it ends with a jibe at my vocation ("divines" means "clergy"):

"A foolish consistency is the hobgoblin of little minds,
Adored by little statesmen and philosophers and divines."
-- Ralph Waldo Emerson, in "Self Reliance"

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